• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2000년도 추계심포지움 및 학술발표회:바이오모니터링 기법을 이용한 환경위해성 평가
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• pp.60-60
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• 2000

• Journal of Photoscience
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• 제9권2호
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• pp.359-361
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• 2002

A green mutant of Rhodobacter sphaeroides 60I was acquired by chemical induction. The blue-shifted of the carotenoid absorption was found in the Light-harvesting complex II (LH2) of the mutant. With the excitation at different wavelength, we observed that the evolution of excited-state dynamics in LH2 of Rhodobacter sphaeroides 60I. The dynamical traces demonstrate a dominant absorption followed concomitantly by an ultrafast transmission increase and decay with 818nm excitation.

• 대한수학회보
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• 제46권3호
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• pp.447-461
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• 2009

In this paper we give a non-existence theorem for Hopf real hypersurfaces in complex two-plane Grassmannians $G_2(\mathbb{C}^{m+2})$ satisfying the condition that the structure Jacobi operator $R_{\xi}$ commutes with the 3-structure tensors ${\phi}_i$, i = 1, 2, 3.

• 한국어류학회지
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• 제22권1호
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• pp.56-60
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• 2010

기름종개와 왕종개로부터 기원한 단성생식집단인 Cobitis hankugensis-Iksookimia longicorpa complex는 대부분 암컷으로만 구성되어 있으며 최근에 1종류의 2배체와 2종류의 3배체집단이 확인되었다. 이들의 난막구조를 조사한 결과 3가지 종류로 구분될 수 있었다. 융모형은 이들의 부모종인 왕종개에서 확인되었으며, 과립형은 기름종개와 3배체집단, 그리고 과립을 가진 융모형은 2배체집단에서 나타났다. 특히 과립형을 가지는 3집단에서는 그들의 길이와 밀도에서 서로 차이를 보였다. 이러한 구조들은 cobitid complex에서 처음 보고될 뿐 아니라 2배체, 3배체 complex집단을 분류하는 데 이용될 수 있다.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.280-287
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• 2015

Three-level PWM rectifiers applied in medium voltage applications usually operate at low switching frequency to keep the dynamic losses under permitted level. However, low switching frequency brings a heavy cross-coupling between the current components $i_d$ and $i_q$ with a poor dynamic system performance and a harmonic distortion in the grid-connecting current. To overcome these problems, a mathematical model based on complex variables of the three-level voltage source PWM rectifier is firstly established, and the reasons of above issues resulted from low switching frequency have been analyzed using modern control theory. Then, a novel control strategy suitable for the current decoupling control based on the complex variables for $i_d$ and $i_q$ is designed here. The comparisons between this kind of control strategy and the normal PI method have been carried out. MATLAB and experimental results are given in detail.

• Annals of Clinical Neurophysiology
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• 제9권1호
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• pp.36-38
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• 2007

The pathomechanisms involved in both restless legs syndrome (RLS) and complex regional pain syndrome type I (CRPS I) are still controversial whether they are central or peripheral origins. We recently encountered a patient who had an unusual coexistence of both RLS and CRPS I, and both of which showed good responses to sympathetic block. These findings suggest the role of peripheral mechanisms, especially unmyelinated small autonomic fiber, in both RLS and CRPS I.

• 한국유변학회:학술대회논문집
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• 한국유변학회 2000년도 춘계 학술발표회 논문집
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• pp.58-61
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• 2000

• 한국추진공학회지
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• 제19권1호
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• pp.76-86
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• 2015

대한민국의 새로운 우주발사체인 KSLV-II에는 적합한, 자신만의 발사운용을 위해서 새로운 발사대 시스템 개발이 요구된다. 새로운 발사대시스템은 운용 효율성의 극대화와 경제성 측면에서 나로우주센터의 기존 KSLV-I 발사대 인근에 구축될 예정이다. 발사대시스템은 통상 기계설비, 전기설비, 그리고 추진제설비의 세 가지 지상설비들로 구성되는데, 이 중 추진제공급설비는 발사체 운용에 필요한 추진제 및 각종 가스류를 보관하고 조건에 맞게 공급하는 시스템들의 집합체로 정의된다. 본 논문에서는 한국형발사체 발사대시스템의 추진제공급설비에 대한 구성 및 기능과, 발사 시 발생하는 고온 고속의 연소 후류를 안전하게 배출하기 위한 화염유도로 형상에 대한 설계 결과를 소개하고자 한다.

• Journal of Pharmaceutical Investigation
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• 제38권1호
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• pp.9-14
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• 2008

Cation exchange resin complex of amlodipine free base has been investigated to improve the stability and dissolution profile. The complex was prepared by reacting amlodipine solution with activated cation exchange resin, and amlodipine content in the complex was 31.6% calculated by HPLC determination. Its product was not physical mixture but the complex formed by ionic bond, which was identified by microscope system, differential scanning calorimetry and X-ray diffractometry. Each tablet containing amlodipine free base(I) and its complex(II) was prepared for the accelerated stability test ($40^{\circ}C$, 75%RH) and dissolution test in the pH 1.2 buffer solution and purified water media. Dissolution patterns of formulation II in both media were similar to those of $Norvasc^{(R)}$ tablet, but the pattern of formulation I in purified water was different. After 6 months storage under stability test, amlodipine content of formulation I, II and $Norvasc^{(R)}$ tablet were $99.3{\pm}1.2%,\;98.9{\pm}1.4%\;and\;83.9{\pm}3.4%$, respectively. While amlodipine free base was unstable at the condition, its complex was not only significantly stable, but also similar in the dissolution pattern. These results suggest the usefulness of complex as a stable carrier for amlodipine free base.

• 약학회지
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• 제53권4호
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• pp.222-227
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• 2009

Human topoisomerase I (Topo I) plays a pivotal role in cell replication, transcription and repair and, therefore, is an important anti-cancer target. 20S-camptothecin (CPT) is a representative Topo I inhibitor. Compounds belonging to CPT family inhibit the religation step of Topo I-DNA by binding to the DNA cleavage site. Computational docking studies with Surflex-Dock were carried out to investigate the binding modes between Topo I-DNA binary complex structure and the ligand such as 20S-CPT and 9,10-substituted 20S-CPT analogues. The docking results demonstrated that most of the compounds with $IC_{50}$ value under $0.5{\mu}M$ intercalated exactly between the -1 and +1 DNA bases, deeply toward the cleavage site. The complex was stabilized by hydrogen-bonding and hydrophobic interactions with both the enzyme and the DNA. The compounds with $IC_{50}$ value above $0.5{\mu}M$ were poorly docked and did not intercalate. In addition, the docking results confirmed the overall correlation between the $IC_{50}$ values and docking scores, indicating the possible use of the modeling for the prediction of biological activity and design of potential inhibitors.